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F. RIVED.

ANGIE GAGE APPARATUS FOR use IN MINING.

APPLICATION FILED AUG-28| 191L Patented June 24,1919.

2 SHEETS-SHEET l.

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A -rronnfmf F. RIVED.

.ANGLE GAGE APPARATUS FOR USE IN MINING.

APPL|cAT|0N mao- A`ue.28. 1917.

Patented J une 24, 1919.

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Emma/)sco ,Elli/eel,

FRANCISCO nIvEp, or` MADRID. srnntl` ANGLE-GAGE APPARATUS rRusEINMININGL i specification of Letters.dement."` j iggtnfd 311119.24,1919,

Application filed August 28. `191'?. Serial No. 188.6157. I

To all whom t mag/concern." j

Be it known that I, FRANCISCO` RIVED, a subject of the King of Spain,residing at Madrid, in the Kingdom of Spain, have invented certain newand useful Improvements in Angle-Gage Apparatus for Use in Mining, ofwhich the following is the specification. j

The difficulties which are encountered in connection with subterraneantopography, are well known to all engineers; In certain places, the useof the theodolite `is rendered either impossible or unsatisfactory forvarious reasons and the special stands required on which the instrumentis `iiXed,

are, `under the conditions obtaining, difficult and cumbersome to set upand employ; while the use of the suspensory compass gives rise tovserious errors inthe horizontal angles, owing to the variousperturbations of the magnetic needle.

My apparatus is intended to obviatefthese disadvantages and the same isshown in the accompanying drawings Figure 1 is a plan view of thehorizontal limb;` i

Fig. 2 is a section on line A B of Fig. l;

Fig. 3 is a plan view of the vertical limb;

Fig. 4 is a section on the line AH `B of Fig. 3; f.

Fig. 5 is a perspective viewof the, apparatus set up in position;

\ Fig. 6 is a detailed view of the means for clamping the scale inpositionj The apparatus consists of three essential parts, namely, onehorizontal, and two vertical limbs, the 'latter being duplicatesinconstruction. i w i i The horizontal limb (Figs. 1 and 2) consists: oftwo parts, the one designated L which We may term fixed is in-the formof a dial plate,the circumference being graduated to correspond tohundredths or the sixtieth part of the circle. The other or movable partis designated L andcarries a slidingscale 41movable adjacent theaduations and `is in the' form 'of a `strip pivotally coniected to thecenter of the dialf plate The dial `plate carries two levelsN and N',placed at right angles to each other. The free end of the member L aswelllas a radial extension of the dial plate are formed with apertures rand 1' respectively,` which are intended to receive the spindles `V ofthe bracket supports Mbf the two vertical limbs which is describedbelow. The movable part L can be fixed to the fixed part `L; after roughadjustment by means of a clip, and a fneradjustment secured` by means ofthe adjusting screw C. These. adjusting devices may be of any well knownor conventional type. i j `The dial `plate has afsmall orice opassingthrough the centerintendedto receive a vertical cord, the purposeofwhich will be presently explained. The screw t is provided to fix theapparatus to the said cord. `The vertical limbs (Figs. 3 andfl) eachconsists of Y a fixed part Z provided with hooks G, intended to suspendthe apparatus from cords, the circumference of which is divided intoequal parts,a movable rod Z', which latter carries the sliding scale n',and" a sliding collar M which can be Xed tothe said rod by means of theset screw T. `The fmovable rod Zcan be' rotated around the center `O ofthedial plate, and fixed relativeto said plate by `means of the clip Pf;the finer adjustmentbeing obtained by means of the coincident screw C.The collarM is provided with a screw a which pery mits fine adjustmentof the collar necessary in order to level the apparatus.

. The distance d .between the rods and the true lines of the stripL`andextension of the` dial plate L is equal to the distance between therods Z` and the hooksG. The `angle te of the hooks G is `very obtusein`order to rectify an error, as to which we will refer later.

The apparatus is used in the following manner i The tender hooks E, E Eare driven `into the side faces of the galleries, and between same aretightly stretched cords o and o from E `toF/and from E to E respectively.in thesame` manner as if working; with a suspended compass. By means ofa plummet the intersectionof the vertical as lregardsthe hook E with thefloor of the gallerycan be arrived at, and at a so determined point,another tenter hook e isdriven. After `having tied one end of a cord ctothe hook E, the other end is threadedthrough the orifice o of thehorizontal limb and fastened to the hook e. f The apparatus `should beput `together beforehand, removing the collar M from the rods Z of thevertical member and inserting the spindles V thereof into the `orificesr and` r `Vbe quite horizontal.

troducing the rods Z intothe collars fixingr same therein by means oitheassociated set screws. AThe hooks Gr of' the two'vertica'l arms will besuspended trom the cords c and o after having loosened the set screws Pand PV of the horizontal limbs.

The horizontal limb is movedalong the Y P andfP are tightened up bymeans of the coincidental screws, .the cords. cand c Will be .found to.be placed exactly; in the apex of the angle cof the hooks G. Y

Then :there is nothing further'to'do but f to read oflby the helpof thesliding scale draw up"y thefplanand` arrive` at and with a handreadingglass, the horizontal angle inlV the limb L and the vertical Vangles onthe limbs Z. The first angle'vvill be the horizontalprojection of. theangle at E Which is formed bythe cords c and Vc,' and the verticalangles will be those that the inclinations 'of the cords c and ofmeasureV With the horizontal.' After that', the measure is taken ofthelongitudes c and cV andth'e height of the tenter hooksE, E and E. abovethe floorV ofthefgallery, repeating the operation at asmany pointsaszmay be necessary (E',E. thus obtaining: all theexact elementsrequired. to

the divergenciesfin 'theleveh K f The three errors which may becommitted inworkingvvith this'apparatus are 1. Error of' stations-'Thiserrorlisfprac'- ti'callym'Zg-if Carefistalren inv determining theVintersection of' the' verticala atrthe hook -Eifwithzthe licor-of? thegalley, because .even in determiningv this point should. a slight verroroccur, this discrepancy becomes enormously reducedpby reason'o theapparatus beingstationed nearer thehooh E than to thefloor. "1 Y' 2.Errors a the horizontal anglesarsz'ng fromtte horzeontalfdoyteotiori ofthccorala It is impossible to commit this errorfinaslmuch as the angle eof the hooks is very obtuse especially ifthe yprecaution is taken 'ofAgreasingthesefhooks on their inner surfaces, While the apparatusdoes..y not maintain-'the positionV necessary tof read oft the 'angles,`the 'hooks' will slip above the-cords,

but nothing-will cause them to deflect' in the horizontal sense.

f 3. Errore mth@ vertical angles proceeding from" any oertc'oclde/Zect/o/a off the" cords-r- T-his error. is committed When taking thevertical angleof'l the cord'solely atv one of its extremities E,inasmuch as the-*apparatus has a-certainuspeciiic Weight.` If however,

' the verticalV angle' isV taken from the other eXtremitylE- thesameerrorzwill be repeated butina contrarysense.. Thatiisito say, an

excess in the first case, a deiciency in the second and vice versa, butby taking the aritlnnetical average of the two readings, the error willhave been annulled.

I am not concerned in explaining the necessary mathematical problem Workentailed, except as would be needed if conducting the operations with` amining compass.

As can be seen, my new mining goniometer combines the great facility ofoperation obtained by means of a suspensory compass and the greatprecision and exactitude obtained with the theodolite, both beingqualities necessary for these operations and which have not hithertobeen obtained in a single apparatus of this kind.

I-Iaving now particularly described the naturek of my said inventionandin what manner the. same is to be performed, I declare that what Iclaimis l.. A device oit' the character described including adial platehaving 'an opening to receive a vertical cord, means for fixing theplate to the cord, and means for suspending the dial plate from pointsremote from the opening.

2. A device ofthe character described including a dial yplate'having anopening to receive a verticalcord, means'or lixing the plate to thecord, an arm pivotally connected to the dial plate at the opening, and'`means Jfor supporting a corner of the dial plate, and the free terminalof the arms..

3. Av device of the character described including a dial plate having anopenincr to receive a cord, means for securing the :dial plate to thecord, av radial extension on said dial plate, an arm pivotallyconnectedy to the late for movement, and means for suspen ing the dialplate from the terminals of the extension and said arm.

4. A device of the character described including a dial plate having` anopening to receive avertical cord, means for fixing the dial plate tothe cord, the periphery of said dial plate being graduated, a radialextension on said dial plate, an arm pivotally connectedlto the dialplate,I aV vernier plate on said arm Jfor movement adjacent thegraduations, means for xing the arm to the plate, and means forsuspending the dial plate from the terminals of the extension and saidarm.

5. Ina device ofthe character described,

Va dial'plate, means for suspending the same including a pair of memberseach including a member plate, means on the membert plates to suspendthe same from a horizontalcord,

and arms pivotally connected on the member plates to depend to supportthe dial on said member plate to suspend the same from horizontal cords,`a rod pivotally con-` nected to each member plate to de end from thesame, and means vertically adjustable on each rod to support the dialplate.

7 In a device of the character described, a dial plate, for horizontalpositioning, means for supporting the same, includin a pair of verticalmembers, each member 1ncluding a vertically disposed graduated plate,hooked members on the upper edge of each plate to suspend the same froma horizontal cord, a rod pivotally connected to each plate to dependtherefrom, means for lixing each rod to its plate subsequent to pivotaladjustment of the rod, and vertically movable means on each rod andsupporting said dial plate.

8. A. device oit' the character described including a dial plate forpositioning in a horizontal plane, and having an opening to receive avertical cord, means for fixing the dial plate to the cord, levelingdevices supported upon the dial late, said dial plate having peripheralgra nations, a radial eX- tension on said dial plate having a terminalaperture, yan arm pivotally connected to the center of the dial platefor movement thereabout, a Vernier scale carried by the arm for movementadjacent the graduations of the dial plate, means for fixing the platesto the dial plates subsequent to pivotal adjustment of the arm, the freeend of the arm having an aperture, a pair of suspending devices eachincluding a vertical semi-circular plate, hook members along thediametrical edge of each semi-circular plate, rods depending from thecorner of each of said semi-eircular plates, to-

enter at their` lower ends the apertures of the dial plate extension andarm, means vertically adjustable on the rods to support the `dial plateand to adjust the same vertically,

and means for fixing each rod to its plate subsequentto adjustment. y

In testimony whereof I aix my signature in presence of tWo Witnesses. l

FRANCISCO RIVED. Witnesses:

J. GoMnR HEREDIA, T. R. DE SALvoR.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

' Washington, D. C.

